Hi Nobuhiro Iwamatsu,
1. Clock frequency of board.
#define CONFIG_SYS_CLK_FREQ 33333333 #define TMU_CLK_DIVIDER 4 /* 4 (default), 16, 64, 256 or 1024 */ #define CFG_HZ (CONFIG_SYS_CLK_FREQ / TMU_CLK_DIVIDER)
I don't understand how to set CONFIG_SYS_CLK_FREQ value. From T-Engine support, they said clock frequency of board is 144MHz.
CPU: SH7727 144 MHz Flash ROM: 80000000 - 807FFFFF : 8 MB (64 KB blk x 128) 80000000 - 8000FFFF : Monitor Area (64 KB) 80010000 - 8001007F : RomInfo Area (128 B) SDRAM: 8C000000 - 8DFFFFFF : 32 MB 8C000000 - 8C001FFF : Monitor & System Area (8 KB)
Could I set CFG_HZ to 144? #define CFG_HZ 144
2. Cross compiler tool chain : GCC vs T-Engine toolchain There are two tool chains - http://www.superh-linux.org/archive/bsp/sh7721_se/toolchain_sh3_gcc4.2.tar.g... support elf32-sh-linux target. - Tool chain from T-Engine forum support elf32-sh-tkernel Using both cross compilers, we could turn on LED on debug board by setting correct value LED_A and LED_B value.
3. ICE or JTAG debugger and LED debugging. I don't have these debug tools, and so hard for debugging. T-Engine/SH7727 DevKit has debug board with 8 LEDs. I could turn on/off these LEDs by setting correct value to 0xA1600000 memory. But C function turn on/off LED cannot work. For example
int cpu_init(void) { // Turn off LED 1 to notify cpu_init is called. outw(0x00 & 0xFF, 0xa1600000); return 0; }
I don't know why it isn't called?
Would you please give me your ideas? Thank you a lot. Regards,